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प्रश्न
Explain the fact that in alkyl aryl ethers, the alkoxy group is ring activating and ortho/para directing towards electrophilic aromatic substitution.
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उत्तर
- Resonance structures of alkyl aryl ethers are as follows:
- The +R effect of −OR the group results in increased electron density at the para- and two ortho positions.
Hence, the alkoxy group in aromatic ether is a ring activating and ortho/para-directing group towards electrophilic aromatic substitution.
संबंधित प्रश्न
Choose the correct option.
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Write chemical equation of acetyl chloride with ethanol
What are the limitations to prepare ether by this method?
What is the action of following on diethyl ether?
dil. H2SO4
In the following reaction:
\[\ce{Ether ->[Hot HI] A + B + H2O}\],
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____________ on heating with excess of conc. HI gives two moles of ethyl iodide.
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\[\ce{(CH3)2CH - O - CH3 ->[Cold HI] X + Y}\]
\[\ce{X ->[K2Cr2O7][dil. H2SO4] Z}\]
\[\ce{Y ->[NaOH(aq)][\Delta] CH3OH}\]
Identify X, Y and Z.
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\[\ce{(CH3)3C - O - CH3 + HI ->[cold] ?}\]
Which of the following compounds does NOT contain \[\begin{array}{cc}\backslash\phantom{.......}\\\ce{C = O}\\
/\phantom{.......}\\\end{array}\] group?
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Isopropyl methyl ether when treated with cold hydrogen iodide gives ______.
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Ethers when dissolved in cold concentrated sulphuric acid forms ______.
Why ethers possess a small net dipole moment?
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Write preparation of diethyl ether.
